The ratio of a circle's circumference to its diameter is a constant but irrational (meaning its precise value cannot be fully written out using traditional numbers) number called Pi (π).
Pi ~= 3.1415927
Circumference = Pi (3.1415927...) * Diameter (120 inches)
~= 376.991118 inches
~= 377 inches
The diameter of a circle is the straight-line distance across the circle, passing through its center. If the diameter is given as 120 cm, then the diameter is simply 120 cm. If you meant the circumference or radius instead, please clarify!
Construct a circle with a 4.5 radius. The circle's circumference is 360 degrees. So mark out 3 by 120 degrees on the circumference and join them to the centre of the circle which will divide the circle into three equal parts.
Circumference = pi ( 3.1416, a constant) * diameter = 3.1416 * 38.2 = 120 sq. units
360 degrees in a circle 120 degrees = 12mm 360 degrees = 36mm Therefore the circumference of the circle is 36mm.
A central angle of 120 is one third of the circle, so the arc length of 28.61 is one third of the circumference. 28.61 X 3 = 85.83
To find the diameter of a circle with a given circumference, you can use the formula: circumference = π * diameter. Given the circumference of 120 inches, you can plug this into the formula: 120 = π * diameter. Solving for diameter, you get diameter = 120 / π ≈ 38.2 inches.
Diameter of the circle: 120/pi = 38.197 inches rounded
Construct a circle with a 4.5 radius. The circle's circumference is 360 degrees. So mark out 3 by 120 degrees on the circumference and join them to the centre of the circle which will divide the circle into three equal parts.
Circumference = pi ( 3.1416, a constant) * diameter = 3.1416 * 38.2 = 120 sq. units
360 degrees in a circle 120 degrees = 12mm 360 degrees = 36mm Therefore the circumference of the circle is 36mm.
Since diameter is twice its radius, the radius of this circle would be 60
A central angle of 120 is one third of the circle, so the arc length of 28.61 is one third of the circumference. 28.61 X 3 = 85.83
Circumference will be 120 pi inches, ie 31 feet and very nearly 5 inches
First we have to find the radius: pi*radius2 = 120 sq ins Divide both sides by pi and then square root both sides: radius = 6.180387232 inches circumference = 2*pi*radius circumference = 38.83251825 or 39 inches to the nearest inch.
Divide the circumference by the value of Pi and divide the result by 2 - that will give you your answer.
Estimate: 3*40 = 120 inches Actual: pi*39 = 122.5 inches to one decimal place
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